The Japan Meteorological Agency announced "Tornado Warning Information" in Izu, Shizuoka Prefecture at 1:43 am.
Gusts such as tornadoes occur when a developed cumulonimbus cloud approaches.
The Japan Meteorological Agency is calling for safety in sturdy buildings, etc., paying close attention to gusts when there are signs that cumulonimbus clouds are approaching, such as lightning, sudden changes in wind, and "hail".